Listing machine



JUe`27, 1939. E. Ff BRITTEN. JR 2,164,227

LISTING MACHINE Filed March 11, 1939 Y' SWW/who@ EDw/N E BE/rrEr/,J/e.

cCuCX/nmQ-mvfm Patented June 27, 1939 UNHTED STATES PATENT OFFICELISTING Application March 11, 1939, serial No. 261,355

4 Claims.

The invention relates to listing` machines, lwherein items are listedupon a paper tape fed around a -rotary platen step by step in theoperation of the machine, a casing for the machine 5 being equipped withthe usual means for confining the noise of the mechanism, preventingvibration of the casing, etc. The paper tape is fed from the platenthrough an exit slot of the casing, and it is found in practice that theloose la end portion of this tape located without the casing, due tovibration communicated thereto by the striking of the type bars of theprinting mechanism of the machine, makes an objection-- able cracklingnoise. It is an. object of the inw vention to provide simple and emcientmeans for preventing this vibration and crackling noise of the loose endportion of the tape.

The invention consists in the .novel construction and combinations ofparts as hereinafter set forth in the claims.

in the accompanying drawing. Figure l is a vertical transverse sectionof the rear portion of the machine, showing the invention as'applied,with the paper clamping means released.

Figure 2 is a similar View of a portion of Figure l on a larger scale.

Figure 3 is a similar fragmentary view, showing the paper clamping meansengaged.

In the drawing wherein the invention is shown as applied to a listingmachine, such for instance as disclosed in the United States patent toL. P. Crosman, No. 1,932,013, issued October i 24, 1933, the numeral idesignates the rotary 35 platen,` the paper tape 2, in the operation ofthe machine being fed from supply roll 3 around said platen and outthrough exit slot t of the casing 5 of the machine, a suitable tear-offmember E being located adjacent said slot.

4o The machine casing is equipped with the usual means for confining thenoise of the mechanism,

preventing vibration of the casing, etc., and in order to preventobjectionable crackling noise of vthe loose end portion 2' of the.papertape 1ocated without said casing, due to vibration com- V municated tosaid loose end portion in the striking of the type bars GII of theprinting mechanism of the machine upon the paper tape as it passesaround the platen, clamping means for the tape located adjacent saidslot is provided, said clamping means being described as follows:

A lever 1, fulcrumed at 8 is provided with an upper arched plate 9positioned with respect to l a yieldable felt abutment member l (whensaid Il lever is disabled by lever 8|8 to be described) to (Cl. IS7-133)form a bend Il in the paper tape during the feeding thereof, enabling ofsaid lever l by its spring I2 upon retractive movement of lever M8causing said arched plate of the lever l to, in cooperation with saidfelt abutment strip, engage said bend il of the .tape and take up slackin and draw said tape tightly against the platen I and to so clamp thetapeduring the striking of the type bars 6| l.

The lever BIB is part of the line spacing mechlll .wanism of the machinedisclosed in the United States patent to H. M. Fleming, No. 2,050,302,dated April l1, 1936, the line spacing members being given an idleupward movement near the end of the forward reclprocation of the actuat'15 ing mechanism of the machine, thereby retracting lever M3 from andadmitting of the lever l being enabled by its spring I2. Atapproximately mid-cycle of machine operation the printing hammers arereleased, the paper tape being held clamped as above described at thistime. At the beginning of the reverse reciprocation of the actuatingmechanism of the machine, the line spacing mechanism will be operatedand lever tlt'will be moved to disable the lever l and release the paperfor feeding thereof.

The felt abutment member lll is spaced forwardly of the tear-off edge'of member 6 and of a felt lining Ul for the lower surface of thetapeexit slot it.

I claim:

1. In a listing machine having arotary platen,

a paper tape supply roll, means for feeding the tape from said rollaround the platen, printing mechanism including type bars for listingitems on said tape, and a casing having a tape exit slot; clamping meansfor the tape located adjacent said slot, and means for enabling anddisabling said clamping means during the operation of the machine toprevent vibration and crackling of the loose end portion of the tapelocated without the casing during the striking of said type bars and torelease the tape during the feeding thereof.

2. In a listing machine having a rotaryV platen, a paper tape supplyroll, means for feeding the ytape from said roll around the platen,printing mechanism including type bars for listing items on said tape,and a casing having a tape exit slot; clamping means for the tapevlocated adjacent said slot, and means for enabling and disabling saidclamping means during the operation of the machine to prevent vibrationand crackling of the loose end portion of the tape located without thecasing during the striking of the type bars and to release the tapeduring the feeding thereof, said clamping means including a movablemember and a yieldable felt abutment member.

3. In a listing machine having a rotary platen, a paper tape supplyroll, means for feeding the tape from said roll around the platen,printing mechanism including type bars for vlisting items feedingthereof, said clamping means including a movable member and a yieldablefelt abutment member, the clamping member and the abutment member beingpositioned to form a bend in the tape and the clamping member beingadapted in cooperation with said abutment member to engage said bend andtake up slack in and draw the tape tightly against the platen.

4. In a listing machine having a rotary platen, a paper tape supplyroll, means for feeding the tape from said roll around the platen,printing mechanism including type bars for listing items on said tape,and a casing having a tape exit slot; clamping means for the tapelocated adjacent said slot, and means for enabling and disabling theclamping means during the operation of the machine to prevent vibrationand crackling of the loose end portion of the tape located without thecasing during the striking of the type bars and to release the tapeduring the feeding thereof, said clamping means including a movablemember a'nd a yieldable felt abutment member and the walls of the tapeexit slot including an upper tear off member and a lower yieldable feltmember, the two felt members being located respectively above and belowthe tape and the felt abutment member being spaced forwardly of theother felt member.

EDWIN F. BRITTEN, JR.

